Power pump rod lift



Dec. 29, 1931- T o. DUCKWORTH POWER PUMP ROD LIFT Filed May 31, 1950 3 Sheets-$heefo Dec. 29, 1931. O DUCKWQRTH v 1,838,373

POWER PUMP ROD LIFT Filed May 31. 1930 s Sheets-Sheet 2.

I Dec. 29, 1931- T. o. DUCKWORTH POWER PUMP ROD LIFT Filed May 31, 1950 3 Sheets-Sheet Patented Dec. 29, 1931 E! srar rnn'orirrns o. nuoxwoa'rn, or SALT LAKE CITY, UTAH 1 POWER PUMP ROD LIFT 7 Application filed May 31, 1930. Serial No. 458,103.

This invention relates to power lifts for a pump rod in wells, and is animprovement over my application No. 883,949, filed Aug. 6,1929. v

One object of the invention is to provide a lift for a pump-rod that will abolish the long stroke beam lift now used on many Wells. V 1

Another object of this invention is to provide a reciprocating vertical motion for a pump with which any length of stroke may be had without increasing the width of its travel. I

Another object of this invention is to pro- '15vvide a pump-rod lift with a counter-balance to givefthe up and down movement to the pump-rod. in a very small space and use a very small amount of power for the ope-ratic-n thereof.

invention comprises certain novel features of construction as hereinafter fully described and claimed. 1 V V In the accompanying drawings forming a 5 'partof this specification and in which correc aracters, is illustrated the preferred form of embodiment of the invention capable of carrying the same into practical operation, it sobeing understood that the invention is not necessarily 7 limited, thereto, as various changes in shape, proportion-and general as semblage of its parts may be resorted to without departing from the principles of the invention or sacrificing any of its advantages, and the right/is therefore reserved for making all changes and modifications which will fall within the scope of the invention Q and claims made therefor. Referringto the drawings:

Figure 1 is a front view of'tho invention. Fig. 2 is a side view of Fig. 1. Fig. 3 is a view of the back end of the counterbalance 7. i

Fig. 4 is an insideview of the housing E. Fig. 5 is a view throughline 55 Fig. 1. Fig. 6 is a side view of the rack 36. Figs. 7 p and 8 are interchangeable racks 50 used in place of Fig. 6.

With these and other objects in view the sponding parts are denoted by like reference Figs. 9 and 10 areviews of the filler tracks used with racks 37 and 38.

Fig. 11 is a face view of the washer 5 1. Fig. 12 is a front view of the support with the housing and counterbalance removed to show the rack F in place.

Fig. 12A is a side view of the support 3. Fig. 18 is a side View ofFig. 12. Fig. 14 is a fragmentary view of the upper end of the housing E with the front faceremoved to show the rack 36, and roller .54

traveling over the track 55 of the rack.

V Fig. 15 is a plan view of thecross-head.

Fig. 16 is a side view of the cross-head D. The reference character A denotes the base i of the invention, B the stand pipe or Christ mas tree of an oil well, O the support of the j invention, D the cross-head, F the rack, E

the housing. 7 i llhe front end of the baseA hasfingers 1 extending forward therefrom. Each finger has an aperturetherein into which is threaded guide rods 10.

Secured to the base A and extending upwards is the support O. On the upper end of section 2 of the support is secured a bearing 5 into which is pivotally placed the'bearing 6 of the counter balance beam 7. The beam '2'- being welded to thebearing 6.

The bearing 5 has wings 8 projecting from its sides to which one end of braces 9- are secured by bolts. The other end ofthe braces being secured to the upper end of the cross head guide rods 10. The outer ends of the braces are connected together by a rod 13' which is secured thereto by bolts 14.

The cross-head D has an aperture 15 in each end through which the guide 10 is placed before threading the guide into aperture 11. In the center of the cross-head is a slot 24 into which is placed a gate 25 which is secured therein by bolts 26. At each side of the slot is an aperture 22 having a bolt 23 threaded through the side of the cross-head and extending therein. On the lower face of the crosshead are lugs 27 having an aperture therein.

On the back end of the counter-balance beam 7 is the counter weight 16 which issecured thereon by a bolt 16a. On the front end are secured brackets 17 to which guides or tracks 18 are secured. The upper end of the guides are curved inward to come into contact with a hook 19 on the upper face of the beam 7. The guides are constructed out of channel iron. Braces 21 are secured at one end to the lower end of the tracks and at the other end to the under face of the beam 7 thus preventing the track being broken by an unexpected jerk.

A cable is placed within the tracks 18 the center thereof being placed over the hook 19 and the ends thereof are placed into the apertures 22 in the cross-head D. The ends projecting tl'irough said apertures and then the bolt is turned to force the point thereon between the strands of the cable forcing them apart in such a manner that the cable is secured to the cross-head.

Secured to the base A and projecting upward is a rack support 3 the upper end thereof being secured to section 2 by a bracket 4which is secured thereto by bolts. In the front face of the support 3 are notches 45, 47 and 49, and passing through the support 3 is a bearing 52a.

The housing rack F is constructed with side strips 41 having roller bearings 42 in each' end thereof. The side strips 41 are spaced apart by bars 43 which are secured to the side strips by counter-sunk screws 44.

The housing rack F is secured into place on the support 3 by placing the bars 43 into the notches 45 and securing them therein by plates 46 which are secured into place by bolts threaded into apertures 46a. The plate 46 is not shown in Figs. 12 and 13.

Placed into the notch 47 and secured there in by bolts is a track or bearing plate 48 which receives the whole weight of the housing rack F. Upon the track 48 the rollers 42 in the bottom of the rack travel as the rack is moved from right to left and left to right.

Placed into notch 49 at the upper end of the support 3 is a guard strip 50 which is secured therein by bolts 51. This guard prevents the rack F from tipping as the rack is moved back and forth. lVhat little tip there is will be taken care of by the rollers 42 in the upper end of the rack coming in contact with the guard. The notches 45 give a clearance between the bars 43 and the support 3 which will allow for any lost motion between the rollers 42 and guard.

Shaft 52 passing through bearing 52a in the support 3 passes through a pinion 53 secured within the housing E to the pinion, the end thereof has a roller "caring thereon. The other end of said shaft passing through a gear wheel 57 that is keyed onto the shaft and the end of said shaft resting in a bearing 56 on support 2.

The housing has a projection 31 on each side thereof, into which is placed threaded apertures 30a. On the back edge of the projections are cleats 32 which are secured thereon by bolts 33. The cleats when so placed form a groove into which the side rods 41 of the housing rack F are placed. Or in other words the cleats hold the housing onto the rack as the housing is moved up and down. On the inner face of the housing is a. planing strip 35 upon which is placed an endless gear rack 36, that is secured to the housing by bolts passing through aperture 70 and then threaded into apertures 71 of the rack.

On the outer face of the endless gear racks 36, 37 and 38 is a track or guard over which the roller bearing 54 travels as the housing is moved into the downward stroke. The roller bearing 54 travels over the inner face of the housing as it is moved into the upward stroke.

The cross head D is connected to the housing E by links 28 which are pivotally connected to the cross head at 29 and to the housing at 30.

A bearing is secured to the support 3 in which rests a shaft 59. On the forward end of the shaft is a pinion 58 which meshes with gear wheel 57. To the rear end of the shaft 59 is to be attached the motive power for operating the pump.

The invention will now be applied to the well. The gate 25 is removed from the crosshead D. The invention is then moved up to the well as shown in Fig. 2 with the Christmas tree B placed between the fingers 1. The crossbred coming into alinement with the pump rod 62 so that the pump rod can be placed within the notch 24. After the rod has been placed into the notch the gate 25 is placed within the notch and secured therein thus holding the pump rod vertical with the lift. After the rod has been so placed a collar 63 is clamped onto the pump rod above the cross head to prevent the pump rod slipping in the cre a head as the cross head is moved upward. Another collar 64 is placed on the pump rod 62 below the cross head to prevent the pump rod slipping in the cross head in the downward stroke, thus leaving the pump rod free to rotate within the notch 24.

In the operation of the pump. Power is applied to shaft 59 which operates pinion 58 to drive gear 57 which operates shaft 52 to turn pinion 53 to operate the rack to move housing up and down. As the housing is moved up links 28 move cross head upward and as the housing is moved downward it draws the cross-head downward by the links 28. The counter balance equals the weight of the pump rod and dead liquid within the pipe.

The movement of the housing E is shown by dotted lines and arrows in Fig. 1, the housing being at the bottom of the stroke.

If it is desired to change the length of the stroke of the pump rod 62 the rack 36 is removed and one of the shorter racks 37 or 38 is placed within the housing and secured therein as rack 36. If rack 37 is used filler plate 40 is placed in the lower end of the housing and secured therein by bolts passing through apertures 61 in the housing and threaded into apertures 62 of the plate, thus placing the edge 55a along dotted line 80 forming a track for'the roller 54 to travel on as the pinion 53 moves the rack to the opposite side to move the rack downward. If rack 38 is used the filler plate 39 is placed within the housing in the same manner and the edge 55a thereon will be in line with dotted lines 81.

Having thus described the-invention what I claim as new and desire to secure by Letters Patent, is:

1. In a power pump rod lift in combination with a base, an upright extending from said base having a bearing on its upper end in which is pivotally placed a counter balance, a housing rack support resting on said base and connected to said counter balance support, said housing support having notches therein, a housing guide rack mounted in,

some of said notches in such a manner that said rack can be moved back and forth, a-

track placed in the lowest of said notches, means for securing said track in said notch, said housing rack having rollers in the bottom end thereof which roll over said track when said housing rack is moved back and forth, another track is secured in the upper of said notches, the upper end of said housing rack having rollers therein that travel under said other track when said rack is moved back and forth, means for securing said housing rack to said housing rack support in such a manner that said housing rack can bemoved back and forth, a housin slidably mounted on said rack, an endless rack within said housing having a track on one side thereof over which a roller bearing travels and means for operating said rack and housing.

2. In a power pump rod lift comprising a i pivotally mounted on the upper end of said support having a weight on one end and a track on the other end in which cables are placed, a cross head, cross head guides secured to said base and to braces secured to said counter balance support, means on said cross head by which a pump rod may pass through, means on said pump rod to prevent said pump rod slipping through said cross head, a housing rack support secured to said base having notches therein through which the housing rack moves back and forth, the housing rack having roller bearings in each end thereof, means for securing said housing rack slidably within said notches, a track secured in a notch at the lower end of said rack support over which said rollers travel in rollers in the upper end of said rack travel assaid rack moves back and forth, a housing having interchangable endless racks therefor slidably mounted on said'housing rack, means for interchanging said racks within said housing to change the length of the stroke of said pump lift, means for connecting said housing to said cross head, means for connecting said cross head to said counter balance, and means for operating said pump rod, cross head and housing, all substantially as set forth. V

3. In a power pump'rod lift comprising a base having a counter balance support extending upward therefrom, said support having a bearing on the upper end thereofin which a counter balance is pivotally placed, a housing guide support having notches therein, a housing rack slidably mounted within said notches, said housing rack having'roller bearings in each end thereof, tracks secured to said rack support on which said roller bearngs travel as the rack is moved back, and forth, a housing slidably mounted on said housing rack, an endless gear rack secured Wlillln said housing having a track on one side thereof over which a roller bearing travels as the housmg moves up and down,

said roller bearing placed on a'shaft upon which a pinion is keyed for operating said endless rack when said shaft is operated, means for operating said shaft, means for connecting said housing with said cross head, 

